There is no reliable single water temperature for the entire lake. Conditions vary by location, depth and season.
Does Lake Powell have one water temperature?
No. Surface temperature can differ across the large reservoir, and water becomes cooler with depth. Sheltered coves may warm differently from deeper open-water areas. Weather and season also make a difference.
Where to find conditions before swimming
Check official National Park Service visitor information, current local weather and information from your marina. For safety-sensitive decisions, use conditions at your specific location rather than a single lake-wide estimate.
Why this page is not showing a number
For current swimming and boating conditions, look for measurements at your intended destination, with a clear time and location.
Return to the latest Lake Powell elevation
See the observed water level, changes and source observation time.
Lake Powell water level today →